Created several quick sketch up of potential models. Most include some sort of mechanical legs that support a steam train-like vehicle. I'm leaning towards either number one or number five. I have also been looking up lots of reference photos especially real steam functioning vehicles such as trains, tanks, and cranes. I also have to look up a tutorial on importing and making a vehicle work in the Unreal Engine.
Below is a3D mock up of sketch one to compare to sketch five which I will be mocking up shortly.